Differential signal transmission cable and multi-core cable
a technology of signal transmission cable and multi-core cable, which is applied in the direction of coaxial cable/analogue cable, basic electric elements, cables, etc., can solve the problems of loosing tape, insulating tape is liable to be loosened at the time of manufacture, and the conductor layer of shield tape at the terminal is difficult to expose, so as to prevent deterioration of transmission characteristics and easy to expose
Inactive Publication Date: 2014-02-20
HITACHI METALS LTD
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Benefits of technology
The invention provides a differential signal transmission cable and a multi-core cable that are easy to manufacture and prevent the deterioration of transmission characteristic by preventing the loosening of the shield tape. Additionally, the shield tape can be easily exposed at the terminal, which makes it convenient for use.
Problems solved by technology
In Patent Literature 2, since the insulating material is covered, as the sheath, on the outside of the shield tape, it is difficult to expose the conductor layer of the shield tape at the terminal.
However, in Patent Literature 1, since the insulating tape is not fixed unless the second insulating tape is wrapped after the first insulating tape is wrapped, the insulating tape is liable to be loosened at the time of manufacture .
As a result, there is a disadvantage that the shield tape is loosened and the transmission characteristic is deteriorated.
In order to prevent the loosening of the insulating tape at the time of manufacture as stated above, the two insulating tapes are required to be wrapped in one step, and the manufacturing process becomes complicated and the manufacturing cost becomes high.
Method used
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[0027]Hereinafter, embodiments of the invention will be described with reference to the attached drawings.
[0028]FIGS. 1A and 1B are perspective views of a differential signal transmission cable of an embodiment, and FIG. 2 is a cross-sectional view thereof.
[0029]As shown in FIGS. 1A and 1B and FIG. 2, a differential signal transmission cable 1 includes a pair of center conductors 2 to transmit a differential signal, an insulator 3 covering peripheries of the center conductors 2, a shield tape 4 longitudinally wrapped around the insulator 3, and an insulating tape 5 spirally wrapped while an adhesive surface 5a faces inside.
[0030]In this embodiment, a twin-ax core 6 is formed by providing the insulator 3 so as to collectively cover the pair of center conductors 2 arranged in parallel to each other, and the shield tape 4 is provided to be longitudinally wrapped around the twin-ax core 6. Incidentally, no limitation is made to this, and for example, the core may be such that two insula...
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A differential signal transmission cable includes a pair of center conductors for transmitting a differential signal, an insulator covering peripheries of the center conductors, a shield tape longitudinally wrapped around the insulator, an insulating tape including an adhesive surface and spirally wrapped around the shield tape while the adhesive surface faces inside, and a non-adhesive tape provided between the shield tape and the insulating tape along a longitudinal direction, and non-adhesively covering a part of an outer periphery of the shield tape in a circumferential direction.
Description
[0001]The present application is based on Japanese patent application No. 2012-180897 filed on Aug. 17, 2012, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a differential signal transmission cable having a structure in which a shield tape is longitudinally wrapped, and a multi-core cable.[0004]2. Description of the Related Art[0005]Hitherto, a differential signal transmission cable is known in which an insulator is provided around a pair of center conductors to transmit a differential signal, and a shield tape including an insulator layer having one surface provided with a conductor layer is wrapped around the insulator.[0006]In the differential signal transmission cable as stated above, when the shield tape is spirally wrapped around the insulator, the insulator layer and the conductor layer are periodically arranged along the longitudinal direction of the cable. Thu...
Claims
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Login to View More IPC IPC(8): H01B11/02
CPCH01B11/02H01B11/1826H01B11/1869H01B11/20
Inventor NONEN, HIDEKISUGIYAMA, TAKAHIRO
Owner HITACHI METALS LTD